'Kyon chalti hai pawan'
because of evaporation.
'Kyon jhoome hai gagan'
because of Earth's revolution.
'Kyon machalta hai mann'
because of excessive respiration.
'naa tum jaano naa hum'
But i have given all the reasons.
'kyon aati hai bahaar'
because of change in seasons.
'kyon lutta hai karar''
because of mental tension.
'naa tum jaano naa hum'
Like i have said these are all science phenomenon.
'Kyon gum hai har disha'
because you have poor sense of direction.
'Kyon hota hai nasha'
because of drug addiction.